Belt cutter



May 12, 1931. v T. E. BUCKNER 1,805,163

BELT CUTTER- Filed June 14. 1930 s Sheets- Sheet 1 may 32, 1931 "RE. BUCKNER BELT CUTTER Filed June 14. 1930 3 Shee'ts-Sheet 2 May 12, 1931. "r. E. BUCKNER sospws BELT CUTTER Filed June 14. 1930 3 Sheets-Shea"? :5

Inventor Y zomc ii fiwlznm' Patented May 12, 1931 PATENT GFFIQE THOMAS E. BU-GKNEB, OF BUBKBURNETT, TEXAS BELT CUTTER Application filed June 14, 1930.

This invention relates to an improved device, which is especially, but not necessarily, adapted for cutting power and propulsion belts, and it has more particular reference to a structure of this class, which is characterized by a novel, simple and economical arrangement of parts, of such construction and arrangement, as to provide a structure which will fulfill the requirements of an invention of this class, in a highly practicable and satisfactory manner.

, Brie-fly stated, the structure is individualized by the presence therein of a suitable frame, having an appropriate bed plate at its bottom, a reciproca-tory cutter knife associated with the frame and located above and movable toward and from the bed plate, and a double acting lever arrangement, and means for actuating the cutter.

The specific structure and relative ar rangement of details will become more readily apparent from the following description and drawings.

In the drawings:

Figure 1 is an elevational view of the complete structure, showing the knife elevator.

Figure 2 is a View like Figure 1, showing the knife moved down to cutting position,

Figure 3 is a transverse vertical section, on

'30 the line 33 of Figure 1.

Figure 4 is an end view.

Figure 5 is a perspective View of the reciprocatory cutter.

Figure -6 is a perspective view of the frame.

Attention is first invited to Figure 6, wherein the details of the frame are shown. This comprises a composite bed plate 7, including a pair of facing plates 8 and 9 disposed on opposite sides of the anvil plate 10. The latter plate is provided with a groove of general V-shaped configuration as shown. The numerals 11 designate generally attaching brackets, at the ends of the structure 7 for securing it to a stationary par-t.

The numerals 12 and 13 represent end posts, each of which embodies a pair of spaced upri hts 14:, havintheir lower ends notched an cfbo'lted to the base 7, designated Serial No. 461,161.

at the point 15. These posts are arranged inward of the ends of the base and the 6X- tended end portions of the base are cut away as at 16 to define cam abutments. The numerals 17 designate spaced parallel rails fastened between the upper ends of the uprights 14. These rails constitute supports for the operating levers 18, and 19. The levers are adjustably tied together through the medium of connecting links 20. The lower end portion of each lever is formed with a cam head 21, eccentrically pivoted on a bolt 22, and projecting up through the rails 17 The levers are obviously operated as a unit.

The cutter device is generally represented by the numeral 23, in Figure 5. It comprises a backing bar 24, having a cutter blade 25, fitted in the notched lower edge portion, held in place by the retaining rib or strip 26. The upper edge of the bar 24 is formed with longitudinally spaced notches 27, in which the curvate perp'heral edge portions of the cams 21, work, as shown in Figure 2. On the opposite ends of the bar are stops 28, whose lower ends bevel to cor- 7 respond with the bevelled abutments 16. The co-acting bevelled surfaces between the parts 16 and 28 allow the blade to feed itself nicely and smoothly in the groove of the anvil plate 10.

The entire device 23 is assembled between the spaced uprights of the respective posts 12 and 13 as shown in Figures 1 and 2, and moved up and down toward and from the base 7. Obviously, by catching hold of the hand grips of the levers and moving them from the right hand position in Figure l over tot-he left hand position in Figure 2, the cam co-acting surfaces between the heads 21 and notches 27, come into play for moving the device 28 bodily downward and engaging the cutting knife 25, with the work, which is placed on the bed plate.

I call attention to the fact that the upper end portion of the uprights 14: are bifurcated to provide attaching cars 29, for the coiled balancing and return springs 30. The springs are anchored on their upper ends to the ears and have their lower endsfastened to the outer ends of the device 23.

Hence, as the lever 19 is brought back to the position shown in Figure 1, the springs lift the device 23 up, off of the work. As before implied, when the cutter device 23 is moving downwardly under this cam action, the bevelled stop 28 feeds gradually into the notched abutment 15 as to render the cutting action steady and dependable.

Various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. In a material cutting device of the class described, a bed plate assembly comprising a central anvil forming member provided in its top with a knife edge receiving groove, and a pair of facing plates on opposite sides of said member, a carrier movable toward and from said bed plate assembly, said carrier including a cutter, support ing means for the carrier, and operating means cooperable therewith.

2. In a structure of the class described, a base, including bevelled end extensions defining abutments, posts attached to the base inwardly of said abutments, rails mounted on the upper ends of said posts, a cutter device comprising a carrier slidably mounted on the posts and movable toward and from said base, spring return means attached to said cutter and posts, and cam co-acting means between the cutter and said rails for actuating the cutter, the ends of said cutter extending beyond said posts and being provided with bevelled stops engageable with said abutments.

3. In a structure of the class described, a base, pairs of spaced uprights attached to and rising from said base, spaced parallel rails mounted on the upper ends of said uprights, a cutter device located between the respective uprights and movable toward and from said base, a knife on said cutter device, and cooperating means for the knife edge carried by said base, suspending springs attached to the cutter device and uprights, levers pivotally mounted on said rails and including cam heads, said cutter device ineluding a bar having notches receiving the curvate marginal edge portions of the cam heads.

4. In a structure of the class described, a base, pairs of spaced uprights attached to and rising from said base, spaced parallel rails mounted on the upper ends of said uprights, a cutter device located between the respective uprights and movable toward and from said base, a knife on said cutter device, and cooperating means for the knife edge carried by said base, suspending springs attached to the cutter device and uprights, levers pivotally mounted on said rails and including cam heads, said cutter device including a bar having notches receiving the eurvate marginal edge portions of the cam heads, the ends of said base extending beyond the adjacent uprights, and being formed with bevelled surfaces constituting abutments, the ends of said cutter device being extended beyond said uprights and provided with bevelled stops cooperable with said abutment.

5. As a new product of manufacture, a frame structure for use in association with a belt cutter of the class described comprising a composite base including a central rail having a longitudinal groove in its top edge, and a pair of facing plates on opposite sides of said rail removably bolted to said rail, the end portions of the rail and plates being formed with complemental bevels forming abutments, attaching brackets secured to said abutments, a pair of posts, each post comprising a pair of spaced parallel uprights, the lower ends of said uprights being removably bolted to said base inwardly of the brackets and abutments, and spaced parallel rails fastened to the upper end portions of said uprights.

6. As a new product of manufacture, a frame structure for use in association with a belt cutter of the class described comprising a composite base, including a central rail having a longitudinal groove in its top edge, and a pair of facing plates on opposite sides of said rail removably bolted to said rail, the end portions of the rail and plates being formed with complemental bevels forming abutments, attaching brackets secured to said abutments, a pair of posts, each post comprising a pair of spaced parallel uprights, the lower ends of said uprights being removably bolted said base inwardly of the brackets and abutments, and

spaced parallel rails fastened to the upper end portions of said uprights, the upper ends of said uprights being bifurcated to provide attaching ears, and a plurality of coiled springs attached to said ears and adapted for suspension connection with a companion cutting device.

7. As a new product of manufacture, a frame structure for use in association with a belt cutter of the class described comprising a composite base, including a central rail having a longitudinal groove in its top edge, and a pair of facing plates on opposite sides of said rail removably bolted to said rail, the end portions of the rail and plates being formed with complemental bevels forming abutments, attaching brackets secured to said abutments, a pair of posts, each post comprising a pair of spaced parallel uprights, the lower ends of said uprights being removably bolted to said base inwardly of the brackets and abutments, and spaced parallel rails fastened to the upper end portions of said uprights, the upper ends of said uprights being bifurcated to provide attaching ears, and a plurality of coiled springs attached to said ears and adapted for suspension connection with a companion cutting device, and a pair of :omplemental levers having cam heads pivotally mounted in an eccentric position between said rails, and links adjustably connecting the intermediate portions of the levers together for unitary operation.

8. In a belt cutting device of the class described, a cutter comprising a backing plate formed in its upper edge With longitudinally spaced cam receiving notches, one side of said plate being formed with a groove, a blade fitted in said groove, a re taining strip maintaining said blade in place, and a pair of stops carried by the end portions of said plates and having their lower ends bevelled in the same directions.

In testimony whereof I aflix my signature.

THOMAS E. BUGKNER. 

